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The Rockford Fosgate P400-4 is a middle-end car amplifier.

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The Rockford Fosgate P400-4 is a middle-end car amplifier. It is a variation of the P400-2, and as such as all the same features. The only difference between the two is the number of speaker channels; the P400-4 has four, while the P400-2 only has two. This gives it superior audio compared to the P400-2. The P400-4 features NOMAD technology, which uses an analog computer to prevent shorting out the speaker wires. It achieves this by calculating in real time the device voltage and current, activating a protection circuit when it senses things are dangerous. The P400-4 also features DSM technology, which improves the efficiency of the circuits. It manages this by laser etched discrete components. This gives the components a 1% tight-tolerance, which decreases cross-talk between the components, thus improving the efficiency of the circuits, as well as lowering the operating temperature.

Features
  • 4 speaker channels
  • NOMAD technology
  • DSM technology
  • Dynamic thermal management
  • MEHSA3 technology
  • Punch EQ2 technology
  • MOSFET technology
  • TRANS-ana technology
  • Rockford Fosgate Avatar
  • Top mounted LED indicators
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